Condensed Consolidated Statements of Redeemable Non-Controlling Interest and Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Redeemable Non-Controlling Interest	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	NICK Shareholders' Equity [Member]	Noncontrolling Interest
Beginning Balance at Mar. 31, 2023	$ 79,809		$ 35,223	$ (76,794)		$ 121,380
Beginning Balance (in shares) at Mar. 31, 2023			7,289
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of Adoption	(210)					(210)
Share-based compensation	26		$ 26
Net (loss) income attributable to common shareholders	1,556					1,556
Ending Balance at Jun. 30, 2023	81,181		$ 35,249	(76,794)		122,726
Ending Balance (in shares) at Jun. 30, 2023			7,289
Beginning Balance at Mar. 31, 2024	58,842
NICK Shareholders' Equity, Beginning Balance at Mar. 31, 2024	58,842	$ 0	$ 35,267	(76,794)	$ 0	100,369	$ 58,842	$ 0
Beginning Balance (in shares) at Mar. 31, 2024			7,289
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of dissenting shares to liability	(4,526)		$ (3,157)			(1,369)	(4,526)
Reclassification of dissenting shares to liability (in shares)			(652)
Redomestication from Canada to Delaware and reduction of par value			$ (32,043)		32,043
Share-based compensation	103				103		103
Issuance of restricted stock awards (in shares)			17
Acquisition of Amplex	3,551	17,644						3,551
Purchase of Amplex shares from noncontrolling interests	1,980	(1,980)			1,980		1,980
Net (loss) income attributable to common shareholders	(3,279)	(210)				(3,278)	(3,278)	(1)
Ending Balance at Jun. 30, 2024	53,121
NICK Shareholders' Equity, Ending Balance at Jun. 30, 2024	$ 56,671	$ 15,454	$ 67	$ (76,794)	$ 34,126	$ 95,722	$ 53,121	$ 3,550
Ending Balance (in shares) at Jun. 30, 2024			6,654